Which of the following BEST describes the relationship between concentration and enzyme activity? A. As enzyme concentration decreases, enzyme activity increases.
B. When substrate concentration decreases, enzyme activity decreases.
C. As substrate concentration increases, substrate activity increases.
D. When substrate concentration increases, enzyme activity decreases.

When the grand canyon formed many small mammal population were divided. some members of the population were on one side and others are on the other, therefore, they were no able to mate with one another. over time this separation and inability to mate with one another led to the emergence of new species. this type of speciation is called a) sympatric speciation. b) allopatric speciation. c) parapetric speciation. d) peripatric speciation.